Encoding

Base64 Decode

Decode a Base64 string back to plain text. Useful for inspecting JWT payloads, decoding values from HTTP headers, or reading data URLs.

Ringkasan alat

Alat ini menerima input berstruktur dan mengembalikan output deterministik dalam pelayar tanpa muat naik pelayan.

Nama alat: Base64 Decode
Niat input: Sediakan kandungan sumber untuk diubah, disahkan atau dianalisis.
Niat output: Terima output ternormal yang sesuai untuk disalin, digunakan semula atau dinyahpepijat.
Contoh input: SGVsbG8sIHdvcmxk
Contoh output: Hello, world

Base64 inputDrop file

Decoded text will appear here after you click Decode.

Plain text outputRead-only

Pengenalan alat

Decode a Base64 string back to plain text. Useful for inspecting JWT payloads, decoding values from HTTP headers, or reading data URLs.

Gambaran keseluruhan alat

Base64 is a reversible encoding that maps every 3 bytes of input to 4 ASCII characters. This tool reverses that mapping and renders the result as UTF-8 text. If the input contains characters outside the Base64 alphabet, or the length is wrong, decoding fails and the tool reports "Invalid Base64".

Kes penggunaan

Use Base64 Decode when you need fast decode base64 back to readable text.
Handle encoding workflows directly in the browser with no install required.
Support SEO long-tail intent by covering quick checks, troubleshooting, and one-off conversions.

Contoh input/output

Niat input

SGVsbG8sIHdvcmxk

Niat output

Hello, world

Soalan lazim

What does "Invalid Base64" mean?+

The input contains characters outside the Base64 alphabet (A–Z, a–z, 0–9, +, /, =), or its length is not a multiple of four after padding.

Can it decode binary files?+

This tool decodes to UTF-8 text. Binary data (images, archives) will appear as gibberish; for those, use a desktop tool that writes the result to a file.

Does it support URL-safe Base64?+

It uses the standard alphabet. URL-safe Base64 replaces + with - and / with _ — convert those characters back before pasting.